Echo CH911DH Owners Manual v.2 - Manual (Page 20)

9 INCH CHIPPER 16
SERVICE & MAINTENANCE
BEFORE INSPECTINg OR SERVICINg ANy PART OF THIS MACHINE, SHuT OFF POWER SOuRCE,
AND MAkE SuRE All MOVINg PARTS HAVE COME TO A COMPlETE STOP.
WARNING
5.7 REPLACING DRIvE bELT
Shut off engine. 1.
Remove large belt guard. 2.
Remove the hydraulic pump belt by loosening the bolts 3.
on the hydraulic pump (Figure 5.4).
SPAN LENGTH
FORCE
20 LBS
7/16" DEFLECTION
Figure 5.5, Belt tension
Take the tension off the drive belt by depressing the belt 4.
engagement pedal. Remove the drive belt from pulleys.
Install the new drive belt on pulleys.
5.
Check pulley alignment with a straight edge and adjust 6.
engine if needed.
Check belt tension and adjust if needed. The belt deflec-
7.
tion at the center of the belt should be 7/16" when a 20
lb. load is placed against the belt (see Figure 5.5).
Reinstall hydraulic pump belt. Readjust hydraulic pump
8.
belt tension by sliding the hydraulic pump in the mount-
ing slots. Tighten bolts.
Replace belt guard.
9.
Depress belt engagement pedal, start engine, engage 10.
drive belt, and test unit. Readjust pulleys and belt ten-
sion if needed.
Figure 5.4, Drive belt
5.8 REPLACING RoToR bEARINGS
Remove the two retaining bolts holding the access 1.
cover to main frame assembly. Tilt access cover over
to allow rotor access.
Remove large belt guard.
2.
loosen bolts on hydraulic pump and remove hydraulic 3.
pump belt.
Take the tension off the drive belt by depressing the
4.
belt engagement pedal. Then, remove the drive belt
from pulleys. using the push bolts from the bushing,
remove the bushing and pulley from the rotor shaft.
Remove the four 1/2" bolts on each rotor bearing and
5.
take off the sensor bracket.
using an overhead hoist or lifting device, lift the rotor
6.
assembly completely out of the frame. The complete
rotor assembly is 275 lbs.
Once the rotor assembly is out of the frame, remove
7.
both collars and bearings. Place new bearings on rotor
shaft. Reinstall front collar onto shaft.
use the overhead hoist or lifting device to return the
8.
complete rotor assembly to the chipper frame.
Slide rotor back until the front collar is tight against the
9.
front bearing. Attach the front bearing to the frame with
four 1/2" bolts. Tighten bolts to 75 ft-lbs. Check and
adjust chipper anvil if needed. Bolt the rear bearing to
chipper frame. Reattach sensor bracket to rear bearing
using a top bearing bolt.
Slide rear collar on shaft against rear bearing. Make
10.
sure the collar bolt lines up with the sensor. Slide bush-
ing onto shaft with flange against collar and lock bush-
ing to shaft. Attach large pulley to bushing. Replace
drive belts on pulleys.
Check pulley alignment with a straight edge and adjust
11.
engine if needed. Check belt tension. Belt deflection
at the center of the belt should be 7/16" when a 20 lb.
load is placed against the belt (Figure 5.5).
Replace hydraulic pump belt. Readjust hydraulic pump
12.
belt tension by sliding the hydraulic pump in the mount-
ing slots. Tighten bolts.
Replace belt guard and resume operation.
13.
Depress belt engagement pedal, start engine, engage 14.
drive belt, and test unit. Readjust pulleys and belt ten-
sion if needed.
CAuTIoN
Failure to maintain proper fastening torque on bolts
may result in damage to the chipper and/or personal
injury!
Check the condition of the drive belt annually or after every
25 hours of operation, whichever comes first. If the belt is
cracked, worn, frayed, or stretched, replace it. Replace
belt with original banded belt type only. Do not use single
type belts.
To replace the belt: